vent/durgo

[frank2]

Another q, advice please

Two upstairs soil pipes exit external walls and run horizontally to meet main stack for downstairs bathroom

1) Can they both exit with 90 bends and go horizontally to vented stack

2) Or will they need vents, I could if ok/needed fit external durgos as the 3m and 0.9m regs and windows cause issues as ive overhanging eaves

thanks again Francis

 

[ree]

A pic would help?

 

[noseall]

Two upstairs soil pipes exit external walls and run horizontally to meet main stack for downstairs bathroom

I presume these two pipes are carrying waste?

1) Can they both exit with 90 bends and go horizontally to vented stack

Yes. The bends aren't quite 90 degrees (just under) but they will be ok.

2) Or will they need vents

Why would they need vents if they are going into a vented stack?

I could if ok/needed fit external durgos as the 3m and 0.9m regs and windows cause issues as ive overhanging eaves

Not sure what you are on about here. As long as the existing stack is vented at the correct height i.e. 900mm above any openable windows etc, then you will be ok. It is not clear why you are referring to AAV's If a soffit overhang interrupts the stack then you either swan neck around it or you go through it via a lead slate.

 

[frank2]

Two upstairs soil pipes exit external walls and run horizontally to meet main stack for downstairs bathroom

I presume these two pipes are carrying waste?

1) Can they both exit with 90 bends and go horizontally to vented stack

Yes. The bends aren't quite 90 degrees (just under) but they will be ok.

2) Or will they need vents

Why would they need vents if they are going into a vented stack?

I could if ok/needed fit external durgos as the 3m and 0.9m regs and windows cause issues as ive overhanging eaves

Not sure what you are on about here. As long as the existing stack is vented at the correct height i.e. 900mm above any openable windows etc, then you will be ok. It is not clear why you are referring to AAV's If a soffit overhang interrupts the stack then you either swan neck around it or you go through it via a lead slate.

Hi Noseall thanks again yes both soil pipes 110mm I just thought if they were unvented then there could be a possibility of a slug of water/waste along the horizontal run causing the traps to suck